Spi 19-313-6 Class Zz Minus Plug Pin Gage 0.3130 in

Product Description

The SPI 19-313-6 is a Class ZZ minus plug pin gage used to verify bore and hole diameters in precision machining and quality control applications. It measures a nominal diameter of 0.3130 inches with a tolerance of 0.0002 inches, conforming to Class ZZ minus specifications. Machined from steel, this gage provides the dimensional accuracy required for go/no-go inspection work in tool rooms, production floors, and inspection departments. Machinists, quality technicians, and metrologists rely on this type of gage to confirm that drilled, reamed, or bored features fall within acceptable size limits.

This pin gage is suited for use in general manufacturing inspection environments where Class ZZ tolerance levels are appropriate. It is used to check hole diameters in metal parts, plastic components, and other workpieces where a 0.3130-inch nominal bore is specified. Typical applications include incoming inspection, in-process checks, and final quality verification in job shops, production facilities, and tool rooms.

Key Features

• Nominal diameter of 0.3130 inches for precise bore verification
• Class ZZ minus tolerance of 0.0002 inches for controlled dimensional accuracy
• Steel construction for durability in production and inspection environments
• Compact and lightweight at 0.2 pounds for easy single-handed use
• Single-piece packaging suitable for individual replacement or toolbox stocking

Compatibility

Designed as an OEM-style Class ZZ minus plug gage for use with standard pin gage handles and sets that accept 0.3130-inch diameter members in typical precision inspection applications.

Installation Notes

Pin gages are handled and stored by quality technicians and machinists. Before use, clean the gage and the bore to be measured to remove chips, oil, and debris that could affect readings. Do not force the gage into a hole; light hand pressure is sufficient for a properly sized feature. Store in a protective case away from other metal tools to prevent surface damage and maintain calibration integrity.